/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #0056b3;
    --secondary: #003366;
    --accent: #ff6b00;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --transition: all 0.3s ease;
}

body {
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.page-container {
    display: none;
}

.page-container.active {
    display: block;
}

/* 头部导航 - 公用 */
header {
    background-color: white;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
    margin-right: 10px;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}

.logo span {
    color: var(--accent);
}

nav ul {
    display: flex;
    list-style: none;
}

nav li {
    margin: 0 15px;
}

nav a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 600;
    font-size: 1rem;
    padding: 8px 12px;
    border-radius: 4px;
    transition: var(--transition);
    cursor: pointer;
}

nav a:hover, nav a.active {
    color: var(--primary);
    background-color: rgba(0, 86, 179, 0.05);
}

.header-cta {
    display: flex;
    align-items: center;
}

.phone {
    margin-right: 20px;
    font-weight: 600;
    color: var(--primary);
    font-size: 1.1rem;
}

.btn {
    display: inline-block;
    background-color: var(--accent);
    color: white;
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #e55e00;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--accent);
    color: var(--accent);
}

.btn-outline:hover {
    background-color: var(--accent);
    color: white;
}

/* 各页面公共部分样式 */
section {
    padding: 50px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent);
}

.section-header p {
    color: var(--gray);
    font-size: 1.2rem;
    max-width: 700px;
    margin: 20px auto 0;
}

/* 首页样式 */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 51, 102, 0.8), rgba(0, 51, 102, 0.8)), url('/imgs/bg.png') center/cover no-repeat;
    display: flex;
    align-items: center;
    text-align: center;
    color: white;
    padding-top: 80px;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: white;
    border-radius: 8px;
    padding: 40px 25px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    color: white;
    font-size: 30px;
}

.advantage-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.product-card {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.product-img {
    height: 250px;
    background-color: #eee;
    overflow: hidden;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-img img {
    transform: scale(1.1);
}

.product-info {
    padding: 25px;
    background: white;
}

.product-info h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--secondary);
}

.factory {
    background: linear-gradient(rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.9)), url('/imgs/aboutus2.jpg') center/cover no-repeat;
    background-attachment: fixed;
}

.factory-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.factory-img {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.factory-img img {
    width: 100%;
    display: block;
}

.factory-info h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--secondary);
}

.factory-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.stat-box {
    background: white;
    padding: 20px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.stat-box .number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
}

.testimonials-container {
    max-width: 800px;
    margin: 0 auto;
}

.testimonial {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin: 20px 0;
    position: relative;
}

.testimonial::before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 20px;
    font-size: 5rem;
    color: rgba(0, 86, 179, 0.1);
    font-family: Georgia, serif;
}

.testimonial-text {
    font-size: 1.1rem;
    font-style: italic;
    margin-bottom: 20px;
    position: relative;
    z-index: 2;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #eee;
    margin-right: 15px;
    overflow: hidden;
}

.author-info h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.process-steps {
    display: flex;
    justify-content: space-between;
    position: relative;
    margin: 60px 0;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 0;
    right: 0;
    height: 3px;
    background: #e9ecef;
    z-index: 1;
}

.step {
    text-align: center;
    position: relative;
    z-index: 2;
    width: 20%;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 30px;
}

.step h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--secondary);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.faq-question {
    padding: 20px 25px;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--secondary);
}

.faq-answer {
    padding: 0 25px 20px;
    color: var(--gray);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* 关于我们页面 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-text {
    padding-right: 20px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 30px 0;
}

.history-timeline {
    position: relative;
    margin: 50px 0;
    padding-left: 30px;
}

.history-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: 4px;
    background: var(--primary);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 30px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: 8px;
    left: -8px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    z-index: 2;
}

.timeline-year {
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.capability-card {
    background: white;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.capability-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

/* 产品页面 */
.products-filter {
    background: white;
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 40px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.filter-group {
    margin-bottom: 15px;
}

.filter-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--secondary);
}

.filter-group select {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: white;
}

.pagination {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.pagination button {
    width: 40px;
    height: 40px;
    margin: 0 5px;
    border: none;
    border-radius: 4px;
    background: #f1f1f1;
    color: var(--dark);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.pagination button.active, .pagination button:hover {
    background: var(--primary);
    color: white;
}

/* 博客页面 */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.blog-card {
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    background: white;
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.blog-img {
    height: 200px;
    background-color: #eee;
    overflow: hidden;
}

.blog-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.blog-info {
    padding: 25px;
}

.blog-date {
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 10px;
}

.blog-info h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--secondary);
}

.seo-section {
    background: white;
    border-radius: 8px;
    padding: 30px;
    margin-top: 50px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.seo-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

.seo-keywords a {
    display: inline-block;
    padding: 8px 15px;
    background: #f1f1f1;
    border-radius: 30px;
    color: var(--dark);
    text-decoration: none;
    transition: var(--transition);
}

.seo-keywords a:hover {
    background: var(--primary);
    color: white;
}

/* 联系我们页面 */
.contact-hero {
    background: linear-gradient(rgba(0, 51, 102, 0.8), rgba(0, 51, 102, 0.8)), url('/imgs/aboutus2.jpg') center/cover no-repeat;
    padding: 120px 0 80px;
    color: white;
    text-align: center;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-top: 20px;
}

.contact-info {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 25px;
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    margin-right: 15px;
    flex-shrink: 0;
}

.map-container {
    height: 400px;
    background: #eee;
    border-radius: 8px;
    overflow: hidden;
    margin-top: 30px;
}

.contact-form {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--secondary);
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: white;
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.quick-links {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 30px;
}

.form-message {
    padding: 15px;
    border-radius: 4px;
    margin-top: 20px;
    display: none;
}

.form-success {
    background: #d4edda;
    color: #155724;
}

.form-error {
    background: #f8d7da;
    color: #721c24;
}

/* 页脚 - 公用 */
footer {
    background: var(--secondary);
    color: white;
    padding: 70px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 50px;
}

.footer-column h3 {
    font-size: 1.4rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent);
}

.footer-column p {
    opacity: 0.8;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent);
    padding-left: 5px;
}

.social-icons {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-icons a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    text-decoration: none;
    transition: var(--transition);
}

.social-icons a:hover {
    background: var(--accent);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.7;
}
.product-series {
    display: flex;
    padding-bottom: 30px;
    text-align: center;

}
.product-series-btn{
    margin-left: 10px;
    background: #e8e2e2;
    border-radius: 5px;
    padding: 15px 30px;
    cursor: pointer;
    font-size: 20px;
    /* 去掉 a标签的 横线 和点击后的颜色*/
    text-decoration: none;

}
.product-series-btn:hover{
    background: var(--primary);
    color: white;
}
.product-series-btn.active{
    background: var(--primary);
    color: white;
}
/* 响应式设计 */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.8rem;
    }

    .factory-content, .about-content, .contact-container {
        grid-template-columns: 1fr;
    }

    .process-steps {
        flex-wrap: wrap;
    }

    .step {
        width: 45%;
        margin-bottom: 40px;
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        padding: 15px 0;
    }

    .logo {
        margin-bottom: 5px;
    }
    .header-cta {
        display: none;
    }

    nav ul {
        margin: 15px 0;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

    .hero p {
        font-size: 1.2rem;
    }

    .hero-btns {
        flex-direction: column;
        gap: 15px;
    }

    .step {
        width: 100%;
    }
}